Luminescent ionic lattice occupation and wide tunable emission spectra of La2MgZrO6:Bi3+,Eu3+ double perovskite phosphors for white light LED |
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| Affiliation: | 1. College of Electronics Information, Hangzhou Dianzi University, Hangzhou 310018, China;2. Department of Materials Engineering, NED University of Engineering and Technology, Main University Road, Karachi, 75270, Pakistan;3. Testing Center of Fuzhou University, Fuzhou University, Fuzhou 350116, China;4. College of Sciences, Hangzhou Dianzi University, Hangzhou 310018, China;5. School of Material Science and Energy Engineering, Foshan University, Foshan 528000, China;6. Shenzhen Institute of Advanced Electronic Materials, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China;1. School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China;2. CISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;3. University of Chinese Academy of Sciences, Beijing 100049, China;4. Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341119, China;1. School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China;2. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;1. School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China;2. School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuanghao 066004, China;3. Key Laboratory of Dielectric and Electrolyte Functional Material, Hebei Province, Qinhuanghao 066004, China;4. College of Metallurgy and Energy, North China of Science and Technology, Tangshan 063210, China;1. Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China;2. Hudong Heavy Machinery Co., Ltd., Shanghai 200237, China |
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| Abstract: | La2Mg1–x/2Zr1–x/2O6:xBi3+ (x = 0.01–0.035, abbreviated as LMZ:Bi3+) and La2–yMg0.99Zr0.99O6:0.02Bi3+,yEu3+ (y = 0.1–0.11, abbreviated as LMZ:Bi3+,Eu3+) double-perovskite phosphors were prepared through high-temperature solid-phase method. The emission spectrum of LMZ:xBi3+ (x = 0.01–0.035) phosphors excited at 353 nm is asymmetric in the range between 375 and 650 nm, showing strong green light. There are two luminescent centers of Mg1/Zr2–O6] and Mg2/Zr1–O6] for Bi3+ occupation, which were analyzed through different excitation wavelengths, Gaussian fitting peaks, fluorescence decay curves and Rietveld refinement of powder X-ray diffraction data. Through deep study of the luminescent lattices in the LMZ matrix, the green to blue tunning-emission is observed by different excitation wavelengths. In addition, red emission is obtained by co-doping Bi3+/Eu3+, and adjustable emission was investigated by changing the content of Eu3+ in the co-doped phosphor formulation, so it is converted from green emission to red emission. The above results demonstrate how to tune emission color by co-doping rare earth ions in the double perovskite phosphor, which is attractive for future applications. |
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| Keywords: | Double perovskite Phosphor Tunable emission Energy transfer Rare earths |
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